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12 hours ago · The Cambridge Dictionary defines consciousness as " the state of understanding and realizing something. " [21] The Oxford Living Dictionary defines consciousness as " The state of being aware of and responsive to one's surroundings. ", " A person's awareness or perception of something. " and " The fact of awareness by the mind of itself and the ...
12 hours ago · Zinc is an essential trace element for humans, [6] [7] [8] animals, [9] plants [10] and for microorganisms [11] and is necessary for prenatal and postnatal development. [12] It is the second most abundant trace metal in humans after iron, and the only metal which appears in all enzyme classes.
12 hours ago · The Moon has been an important source of inspiration and knowledge for humans, having been crucial to cosmography, mythology, religion, art, time keeping, natural science, and spaceflight. On September 13, 1959, the first human-made object to reach an extraterrestrial body arrived on the Moon, the Soviet Union's Luna 2 impactor.
12 hours ago · The body of an adult human contains about 4 grams (0.005% body weight) of iron, mostly in hemoglobin and myoglobin. These two proteins play essential roles in oxygen transport by blood and oxygen storage in muscles. To maintain the necessary levels, human iron metabolism requires a minimum of iron in the diet.
